I don't often have nightmares, but I had one like these a while back, where I was frozen and could not move, and this man was quietly walking over to pull back the covers on my bed and began touching me against my will. I knew it was a dream, but it fell so visceral, so real - perhaps because I've been touched against my will plenty in my waking life. I was finally able to scream for James, and that woke me up. He was right there to comfort me, and for that I'm grateful, but the adrenaline and cortisol were pounding in my body.
I hope that this is simply a part of your healing process and that in time these dreams will stop, but we shouldn't have to have them in the first place.